[Discuss-gnuradio] Re: debug freezing

[feldmaus]

Josh Blum <josh <at> joshknows.com> writes:

> Do you think that it might be possible for peak detector to output 
> always the same number at "some frequencies"?
I think not. The Peakdetector(with TH factor Rise and Fall) works and the
Peakdetector2 works not. Maybe there are some bugs in the peakdetector2
(with only TH factor Rise).

> 
> Replace the peak detector with a source of constant 0 or a source of 
> constant 1, do the plots appear frozen?
Yes i did this and also other combinations, but only when i play with
Peakdetecor2, my application freezes.
> 
> It seems that if you give the graphical sinks a signal that never 
> changes, the plotted waveforms will also not change.
My application is really freezed. I changed the signal frequency, so i
can watch how the signal in the scope changes, but when i change to
special frequencies, then i get my application freezed.
> 
> Further, if your scope is triggering on channel 1 (the blue) and blue is 
> constant, the scope cannot find a trigger point, and stop plotting new 
> samples until a trigger point is found.
I tried this also, but this doesnt solve this problem.

As i said this problem doe not appear in Pekdetector but in 
Peakdetector2.

Further on the Peakdetecor finds peaks whether i changed the TH factor Rise
to 10e15. :-) It would be nice if you give me some instructions
for the alpha value and look ahead. Because i think i missunderstood the
documentation of the peakdetector.

Will there be always an average value calculated or only when the threshold
founds  some possible peak ?

Can you please explpain in your own words the alpha value ?

regards markus